What is it?

here is the phrase: "So I’m positive about the world in general and I think the world has become closer-knit. "
What is closer-knit?

“Close-knit” means to having social/cultural ties.

For example, we usually say, “They are a close-knit family,” which means that their family is very close. You can also say, “It’s hard to get in with their crowd. They are a close-knit group.” This means that this group has a social or cultural bond, so it would be hard for just anyone to join them.

Hope that helps!

Yes, it helped a lot!
Thanks for this and for the other one.

Wiktionary: close-knit - Wiktionary explains where the word comes from and it even has a picture of knitting!